The duration of oestrus and the time of ovulation in cattle of three breed types with and without synchronisation of oestrus with a progestogen.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D004971:Estrus / Q000187:drug effects*; D005260:Female; D005298:Fertility / Q000187:drug effects; D010060:Ovulation / Q000187:drug effects*; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology*
D011374:Progesterone